About the Authors
NF is on the Obstetric Advisory Board of Ferring UK. RA has received non-restricted grants from Pfizer to explore innovation in the life sciences, from Merck to analyse the health sector in Turkey, and from Hoffman-La Roche to analyse variations in cancer services in Europe.
NF collected and analysed the data. NF and RA jointly conceived the idea, interpreted the data, and jointly wrote and approved the final manuscript. NF as corresponding author had full access to the study data and had final responsibility for the decision to submit for publication.